Home / 20,279.36-30,419.25-7,131.65

Finding the Fourth Proportional to 20,279.36, 30,419.25 and 7,131.65

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Solution

The fourth proportional to 20,279.36, 30,419.25 and 7,131.65 is: 10,697.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.36 : 30,419.25 = 7,131.65 : x
  2. Step 2: Convert to fraction form
    20,279.36/30,419.25 = 7,131.65/x
  3. Step 3: Cross multiply
    20,279.36x = 30,419.25 × 7,131.65
  4. Step 4: Simplify right side
    20,279.36x = 216,939,265.42
  5. Step 5: Solve for x
    x = 216,939,265.42/20,279.36
  6. Step 6: Final answer
    x = 10,697.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.